Nowadays green food is popular. We need green food and good health,         not all people knew that well years ago. When I was in Grade Seven, my teacher asked us to          something about green food by ourselves. We had no idea at first. Then our four-member group had a         and went to do some research (调查) in a supermarket. Two of us wrote down the names of the         food on the shelves. The other two         customers (顾客) some questions like “Do you know what green food is?” “How often do you         green food?” and so on. More than 30 customers         our questions! Later each group in our class wrote a research report         the topic and handed it in (交上). Our teacher chose the         ones and put them up on the wall of the classroom.         was one of them! We not only learned a lot about green food but also knew how to keep healthy.

A．so B．and C．or D．but

A．learn B．plant C．make D．buy

A．game B．lesson C．discussion D．fight

A．delicious B．green C．fast D．colorful

A．asked B．told C．helped D．answered

A．buy B．sell C．give D．send

A．copied B．asked C．answered D．remembered

A．in B．about C．to D．for

A．long B．short C．bad D．excellent

A．Mine B．Theirs C．Ours D．His